Pulpwood chain sawing machine



y 1951 A. .1. JOHNSON ET AL 2,554,989

PULPWOOD CHAIN SAWING MACHINE Filed April 24, 1948 I 4 Sheets-Sheet l 26 FIG.\.|

INVENTOR. ALFRED J. JOHNSON FOSTER D. MOCORMACK 9/ w an y 1951 A. J. JOHNSON ET AL 2,554,989

PULPWOOD CHAIN SAWING MACHINE Filed April 24, 1948 4 Sheets-Sheet 2 FIG.4

JNVENTOR. ALFRED J. JOHNSON i FOSTER D. McGORMACK y 1951 A. J. JOHNSON ET AL 2,554,989

PULPWOOD CHAIN SAWING MACHINE Filed April 24, 19. 18 4 Sheets-Sheet3 I INVENTOR. ALFRED J. JOHNSON Y iEOSTER D. MGCORMAGK y 1951 A. J. JOHNSON ET AL 2,554,989

PULPWQOD CHAIN SAWING MACHINE FIG. 6

. INVENTOR ALFRED J. JOHNSON BlfOSTER D. MOCORMACK i atenteci May 2 9',

OFFICE PULPWOOD CHAKN SAWING MACHINE Alfred J. Johnson, Ranier, and Foster D. McCormack, International Falls, Minn.

Application April 24, 1948, Serial No. 22,994

7 Claims.

The present invention relates to machines for sawing logs and the like, particularly of a log size adapted for use as pulpwood.

The primary object of the invention is to provide a generally improved machine of this class whereby the operation to be performed may be accomplished rapidly and with facility and safety, and the machine can be constructed relatively in-- expensively and will be durable. The machine in its preferred form embodies a chain saw for sawing pieces of any desired length simply and efficiently by advancing the logs or pieces to be sawed against the cutting means and means for firmly holding the log or piece while being sawed against the cutting means.

To these and other ends the invention consists in certain improvements in combination and arrangement of parts, all as will be hereinafter more fully described, the novel features being pointed out particularly in the claims forming a; part of the specification.

- In the accompanying drawings:

. Figure 1 is a side elevational view taken along lines ll of Figure 4;

Figure 2 is a view taken along lines 2-2 at Figure 4;

Figure 3 is a View with portions broken away showing one cutting means and the means for holding the log against the cutting means;

Figure 4 is a top plane View of the improved logcutting machine;

Figure 5 is a perspective view with portions broken away of the cutting machine; and

Figure 6 is a schematic view of the hydraulic means for controlling the operation of the machine.

The preferred embodiment of the invention is shown in the accompanying drawings and will be hereinafter described in detail. It is to be understood, however, that the invention is not restricted to the precise construction shown and that equivalent constructions within the scope of the claims at the end of the specification may be used. It is preferred that the frame supporting the cutting element be provided with skids or runners on which the machine is secured so that it may move from place to place as the cutting operation requires. It being understood that the frame may be supported on wheels.

Referring to the drawings in detail, [0 indi- 2 cates the machine generally wherein is provided longitudinally extending frame members H and I2 with cross members l3, I4, Hi, It and H. It is to be understood, however, that as many cross members and longitudinally extending members may be provided as desired to provide a strong frame for supporting the cutting means. A trough-like member 18 is supported by the frame members and members 59. Secured to the members l9 and extending rearwardly therefrom and bent into substantially the shape of are are members on which the log to be cut is rolled, slid or skidded when being advanced against the cutting means. Mounted on the frame are members 22 which are so constructed that the chain 2| moves between the walls of each of these members. These chain saws are driven from power shaft 24. When a log is to be cut, it is received by arm-like members 26, which are braced together by means of member 28. The brace 28 is offset with respect to the arms 26 and adjacent y the inner end of the arms 26 is projection 29 which prevents the leg from rolling too far for ward on the arms 26 until the log contacts the surface of the members 3!). The rack 32 which may be operated hydraulically or by any other suitable means, cooperates with the gear members 34 mounted upon shaft 36 to raise the logs to the cutting position and hold it in contact while the log is being cut. The rack 32, operated hydraulically, receives its power through cylinder member 38. For rotating the shaft 36, which controls the speed of operation of the cutting means, is motor 48 which drives through suitable belting 42, pulley 44, belt 4'6, and pulley :28 mounted on shaft 24. Housing 5%) is provided for covering the source of power. It being understood that the source of power is not limited to a motor as shown. The chain saws operate a substantially triangular shape, as shown clearly in Figure 2. They pass over pulley 52 and 5d, and drive sprocket 4i, and the direction of the rotation being in the order named. Connected to upright members 28 are members 22 which have the other end attached 'to members it, and these members 22 support the chain saw, particularly when the saw is cutting. Saw guides or members 22 taper in a direction away from the saws. The log will be forced against the chain saw and the supporting members 22 must be provided to hold the saw in its tion of the apparatus.

and combine therewith a relief valve 66.

pulleys driving-the chainsaw 2|. -ployed only on pulleys 52 or -54, and itis also tree-length logs desired position during cutting. Mounted in the bottom of the trough I8 is a suitable conveyer such as a chain conveyer 58. It is preferred that this conveyer be so operated that it can rotate in either direction so that if one log is of a given species, the wood may be discharged at one end, and if the next log is of a different species, the sawn wood can be discharged at the opposite end. In Figure 3 there is shown means 60 of providing lubrication for the chain saw. Each means 60 is connected to a common supply line 60* which in turn is connected to a suitable source of supply (not shown). This is essential and is a most convenient place to provide lubrication. In this figure is also clearly shown how the arms 26 hold the wood under substantially constant pressure against the cutting means.

In Figure 6 is shown a schematic hydraulic arrangement for controlling the power applied to the gear racks 34. A hydraulic'cylinder 38 has suitable fluid flow pipes connected to opposite ends thereof. These lines pass to a four-way reversing valve 62, generally preferably of the Vickers spring-centered type. From there one of the lines passes through a flow control valve 64, through which the operator controls the opera- This line then leads into a pump 68 for operatingpressure to the system From thepump the line leads into an oil reservoir!!! where the fluid for operating the hydraulic system is stored. From this storage tankan oil line leads back to the four-way reversing valve.

In operation, a full tree length log which is to be cut into pulpwood sticks is rolled on the arms 26,- asmany being employed as the length of the tree to besawn requires. The armsare then raised asshown in Figure 2, the log rolled upon the member 30.

severed portion falls into the trough members I8 "and are conveyed to the desired end by' means of i It is generally preferred that a conveyer 58. some type of take-up be provided on all of the It may-be emgenerally preferredthat the-proper tension on the cutting chain be maintained by any suitable -means such as springs (not shown).

'Wh-at is claimed:

1. A sawing device for dividing substantially into pre-determined lengths comprising an elongated frame member, a longitudinally extending shaft pivotally mounted on the frame, a series of sawing means on the frame, a series of pairs of arms mounted on the shaft for forcing logs against said sawing means, arcshaped members positioned between each-of the pair of arms, said arc-shaped members mounted on the frame adjacent the shaft and curving upwardly from said shaft for supporting logs being sawed, the said sawing meanspositioned between the arc-shaped members, and means on the frame and positioned below the sawing means for receiving portions of the logs divided by the sawing means.

2. A sawing device for dividing substantially tree-length logs into pre-determined lengths comprising an elongated frame member, a longitudinally extending shaft pivotally mounted on the" frame member, a series of sawing means on the frame, a series of pairs of arms mounted on the shaft for forcing logs against said sawing means, 10g support members located between each of the pair of arms, said log support members mounted on the frame adjacent the shaft and curving upwardly therefrom for supporting logs being sawed, the sawing means positioned between the log support members, and a member on the frame and positioned below the sawing means for receiving portions of the logs divided by the sawing means.

3. A sawing device for dividing substantially tree-length logs into pre-determined lengths comprising an elongated frame member, a longitudinally extending shaft pivotally mounted on the frame, a plurality of spaced-apart log support means mounted on the frame and extending upwardly therefrom, a plurality of pairs of arms mounted on the shaft for moving a log on the log support means, a pair of said log support means mounted between each of the pair of said arms, a series of chain saw support means mounted on the frame, a chain saw means operatively mounted between the log support means on the chain saw support means, and means on the frame and located below the chain saw means for receiving divided portions of the tree-length logs.

'4. A sawing device for dividing substantially tree-length logs into pre-determined lengths comprising an elongated frame member, a longitudinally extending shaft pivotally mountedon theframe, a plurality of spaced-apart log support means mountedon the frame and extending upwardly therefrom, a plurality of pairs of arms mounted on the shaft for moving a log on the log support means, a pair of said log support means mounted between each of the pair of said arms, a series of chain saw support means mounted on the frame, and a chain saw means operatively mounted between the I log support means on the chain saw support means.

5. A sawing device for dividing logs into predetermined lengths comprising an elongated frame member, a longitudinally extendingshaft pivotally mounted on the frame, a plur'a'lity of spaced-apart log support means mounted'on the frame, a plurality of pairs of arms mou'nte'd on the shaft for moving a log on the log support means, a pair of said log support means mounted between each of the pair of said arms, a series of chain saw support means mounted on the frame, a chain saw means operatively mounted on each chain saw support means, each of the said chain sawsmounted to operate in a substantially triangular path and between the log support means.

6. A sawing device for dividing logs into-predetermined lengths comprising an elongated framemember, a longitudinally extending shaft pivotally mounted on the frame, means for operating said shaft including hydraulic means, a plurality of spaced-apart log support means -mounted on the frame, a plurality of pairs of arms mounted on the shaft for moving a log on the log support means, a pair of said log support means mounted between each of thepair of said arms, a series of chain saw support means mounted onthe frame, a chainsaw meansoperatively mounted on each chain saw support means and between the log support means, and means on the frame and positioned below'the chain saw means for receiving divided portions of the tree-length logs.

'7. Adevice-for dividing a log intoipredetermined lengths comprising an elongated frame member, a longitudinally extending shaft member pivotally mounted on the frame member and adjacent one edge thereof, chain saws operatively mounted on the frame, a plurality of pairs of arms mounted on the said shaft for holding the log against chain saw, a pair of log support means mounted on the frame between each pair of arms, the said chain saw operatively mounted between the log support means, and a means mounted on 10 the frame in a plane below the chain saw for conveying divided lengths of the sawed log.

ALFRED J. JOHNSON. FOSTER D. MCCORMACK.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Number Name Date Dougherty May 10, 1863 Magaw June 19, 1883 Martin June 23, 1925 Morris Jan. 26, 1932 FOREIGN PATENTS Country Date Germany Nov. 15, 1904 Australia July 13, 1926 

